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US 8,615,831 B2Granted
Self inflating air mattress
AssigneeJoerns Healthcare Inc.
InventorsShawn Lipman, John R. Laverack, George E. Riehm, Edward A. Gilchrest, Jr.
Life of this patent
Estimating the term…
Abstract
A mattress includes a plurality of air cells. Each cell has a low air permeability envelope and a foam inflation structure that defines one or more voids inside the low air permeability envelope. The foam inflation structures expand when unloaded to cause inflation of the one or more voids. When unloaded, the ratio of the volume of the foam inflation structure to the volume of the one or more voids within the low air permeability envelope is not the same in all the cells.
Claims20
A mattress comprising:
- a plurality of air cells, each having a low air permeability envelope and a foam inflation structure that defines one or more voids inside the low air permeability envelope and that expands when unloaded to cause inflation of the one or more voids;
- wherein, when unloaded, the ratio of the volume of the foam inflation structure to the volume of the one or more voids within the low air permeability envelope is not the same in all the cells.
A mattress comprising:
- a plurality of air cells, each having a low air permeability envelope and a foam inflation structure that defines one or more voids inside the low air permeability envelope and that expands when unloaded to cause inflation of the one or more voids, wherein, when unloaded, the ratio of the volume of the foam inflation structure to the volume of the one or more voids within the low air permeability envelope is not the same in all the cells;
- a plurality of zones, each zone including at least one air cell;
- and
- a plurality of check valves, each zone including a check valve that permits air flow into the air cells in the zone and prevents air flow from the air cells in the zone.
1 more element
A mattress comprising:
- a plurality of air cells, each having a low air permeability envelope and a foam inflation structure that defines one or more voids inside the low air permeability envelope and that expands when unloaded to cause inflation of the one or more voids, wherein, when unloaded, the ratio of the volume of the foam inflation structure to the volume of the one or more voids within the low air permeability envelope is not the same in all the cells;
- a plurality of zones, each zone including at least one air cell;
- and
- a plurality of groups of air cells, each of the groups of air cells comprising alternating air cells in one zone, wherein each zone includes air cells in two different groups of air cells;
- and
- a plurality of check valves, each of the check valves permitting air flow into the air cells in one of the group of air cells and preventing air flow from the air cells in the same group of air cells.
3 more elements
Dependencies are inferred from the claim text.